Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:17:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<g[node].size();i++) ^ user.cpp: In function ‘void compute_d1(int)’: user.cpp:27:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<g[node].size();i++) ^ user.cpp: In function ‘void compute_up(int)’: user.cpp:44:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<g[node].size();i++) ^ user.cpp:45:11: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(g[node][i]!=dad[node]) ^ user.cpp:57:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<g[node].size();i++) ^ user.cpp:43:28: warning: variable ‘w2’ set but not used [-Wunused-but-set-variable] int i,h1=-1,h2=-1,w1=0,w2=0; ^ user.cpp: In function ‘void compute_d2(int)’: user.cpp:68:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<g[node].size();i++) ^ user.cpp:102:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<g[node].size();i++) ^ user.cpp:123:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<g[node].size();i++) ^ user.cpp:67:36: warning: variable ‘w3’ set but not used [-Wunused-but-set-variable] int i,h1=0,h2=0,h3=0,w1=0,w2=0,w3=0,dmax1=0,dw1=0,dmax2=0,dw2=0,son; ^ user.cpp:67:63: warning: variable ‘dw2’ set but not used [-Wunused-but-set-variable] int i,h1=0,h2=0,h3=0,w1=0,w2=0,w3=0,dmax1=0,dw1=0,dmax2=0,dw2=0,son; ^ user.cpp: In function ‘int main()’: user.cpp:130:13: warning: variable ‘a’ set but not used [-Wunused-but-set-variable] int n,i,a,b; ^ user.cpp:128:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("plimbare3.in","r",stdin); ^ user.cpp:129:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("plimbare3.out","w",stdout); ^ user.cpp:131:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^